1994 Camry Brake Light Switch - Toyota Nation Forum : Toyota Car and Truck Forums


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3rd & 4th Generation (1992–1996 & 1997–2001) Toyota Camry Discussion for years: 1992-1996 & 1997-2001 Topics of discussion range from fuel economy, safety, modifications, performance all involving America's favorite family car, the Toyota Camry.

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Old 06-04-2011, 07:50 PM   #1 (permalink)
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1994 Camry Brake Light Switch

I'm no mechanic, but I've concluded that my brake light switch needs to be replaced: The idiot light on the dashboard came on when I started the car last evening, and refused to turn off; simultaneously, the cruise control stopped working. I drove about 30 miles without noticing any problems with the brakes, so I assumed it was a short, blown fuse, or some other electrical malfunction. But after I parked the car and returned 3 hours later, I discovered that my brakes were no longer working properly: I had very little braking ability. I brought the car to a mechanic (driving there without effective braking power was an incredibly frightening experience), who quickly found that the brake hose had failed (it was quite old). He replaced the hose, added fluid, and the brakes are fine.

However, the problem with the idiot light/cruise control remained. I thought, therefore, that perhaps the two problems — idiot light/cruise control and brake failure — were unrelated. Out of curiosity, I disconnected the wiring harness that goes from the brake-fluid reservoir under the hood, into the body of the car — I'm assuming to the brake light switch. Lo and behold! the idiot light extinguished, and the cruise control became operational. Hence, I concluded that the brake light switch is the likely culprit.

The local auto parts store sells the switch (the version that handles both the brake lights and cruise control) for $24. Clearly, a mechanic would charge me much more for the part, plus probably an hour's labor. I'd like to avoid spending so much money for something that doesn't require the expertise of a skilled auto mechanic. But I'm not the most mechanically inclined (i.e., I'm not very bright ), so I'd need detailed instructions, along with a decent diagram(s).

Can anyone help?
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Old 06-04-2011, 08:16 PM   #2 (permalink)
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Was the idiot light "BRAKE" in red? (Im sure when the hose blew it was..)

Anyways, the cruise control light is unrelated totally to the braking system. Could just be a fuse for that.

If you got a light on the dash with a car on it in the lower left corner, what this means is that your brake light bulbs have blown, or are about to blow.

The brake switch is probably OK if your brake lights actually turn on. If they dont turn on when you press the brakes, the brake light switch will need replaced more than likely.

Let us know what idiot light was on the dash board if any besides the "BRAKE!" light
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Old 06-04-2011, 08:49 PM   #3 (permalink)
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Quote:
Originally Posted by Mister_Perkins View Post
Was the idiot light "BRAKE" in red? (Im sure when the hose blew it was..)
Yup.

Quote:
Anyways, the cruise control light is unrelated totally to the braking system.
To my surprise, I heard otherwise. Apparently, the two can be linked together for safety reasons: Loss of braking power would not only alert the driver, but also signal (via the same brake switch) the car to disengage the cruise control, to assure that the car isn't traveling at high speed when the brakes are compromised. That seems to be confirmed by the availability of two versions of brake switch: One with the ability to disengage the cruise control, and a less-costly version without such an ability (for cars that are not equipped with cruise control).
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Old 06-04-2011, 09:17 PM   #4 (permalink)
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the cruise control is disengaged by the brake pedal, or the Cruise control buttons on the steering wheel. I've never heard of the CC system automatically disengaging when the brake sensor comes on. The brake sensor is simply a two wire sensor thats connected to the cluster. When the fluid level drops below the sensor, it closes the circuit and illuminates the BRAKE light.

There may be something designed into the cruise control module, but i've never heard of it or saw it happen before and I've blown brake lines.

What you can try to do is re-set the computer..

Either pull the ECU Fuse, or disconnect the battery terminal for a few minutes and see if the problem comes back.

It's always best when working on vehicles to do the easiest stuff first, and resetting the computer would be the easiest thing to do as of now.
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Old 06-04-2011, 10:18 PM   #5 (permalink)
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Quote:
Originally Posted by Mister_Perkins View Post
the cruise control is disengaged by the brake pedal, or the Cruise control buttons on the steering wheel. I've never heard of the CC system automatically disengaging when the brake sensor comes on. The brake sensor is simply a two wire sensor thats connected to the cluster. When the fluid level drops below the sensor, it closes the circuit and illuminates the BRAKE light. ...
From WikiTuneUp: "A malfunctioning brake light switch can be dangerous while driving a car. … Typical signs of damage to the switch include the cruise control not working on your Camry. …"


Results of a search I did at an auto parts store for a replacement brake light switch showing the two different versions: PepBoys

Last edited by Mr. Mytzplk; 06-04-2011 at 10:59 PM.
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